Die-press.



E. W. ROBINSON.

DIE PRESS.

APPLICATION FILED 1AN.7.1915.

Patented Mann, 1916.

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E W. ROBINSON.

DIE PRESS.

APPLICATION FILED JAN-7,1915. 1, 175,663. Patented Mar. 14, 1916.

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\A/KNEssEs n l\/EN10R W o. W EDWARD w. oaaNsoN QL/LM/ 137M R! Y E. w.ROBINSON. DIE PRESS.

APPLICATION FILED JAN- T, I9I5- 1,175,663. Patented Mar. 14, 1916.

4 SHEETS-SHEET 3.

E. W. ROBINSON.

DIE PRESS.

APPLICATION FILED 1AN.7.1915.

1,175,663. Patented Mar. 14,1916.

4 SHEETS-SHEET 4.

\A/rfNEssEs INVENTQR MEM R ROBINSON B) we qfwoghly wfm MW 1 rr earnsrannr re.

EDWARD W. ROBINSON, OF SAVANNAH, GEORGIA, ASSIGNOR TO INTERNATIONALBARREL COMPANY, OF SAVANNAH, GEORGIA, A CORPORATION OF GEORGIA.

DIE-PRESS.

' Specification of Letters Patent.

Patented Mar. 14;, 1916.

Application filed January 7, 1915. Serial No. 945.

To all 107mm it may concern:

Be it known that I, EDWARD V. ROBIN- son, a citizen of the UnitedStates, residing. in Savannah, Georgia, have invented certainImprovements in Die-Presses, of which the following is a specification.

My invention consists of a press for so acting, by means of dies, upon asheet metal ring having an angular cross section as to produce a hoopconsisting of a ring having substantially parallel flanges projecting atan angle therefrom at each edge, one of said flanges also having, ifdesired, an inwardly projecting flange at its free edge.

In the accompanying drawings-Figure 1 is a front elevation of a diepress made in accordance with my invention; Fig. 2 is a view, partly inside elevation and partly in section; Figs. 3 and at are diagrammaticviews illustrating the successive actions of the dies; Fig. 5 is aperspective view of the blank from which the hoop is to be produced;Fig. 6 is a perspective view of the finished hoop, and Fig. 7 is a sideelevation of part of the press, illustrating a special feature of myinvention.

As shown in Fig. 5 the blank from which the hoop is to be producedconsists of a split ring presenting in cross section flanges 1 and 2 anda connecting web 3, the latter being at right angles or thereabout tothe flanges 1 and 2, which are in parallel or substantially parallelplanes. The purpose of the die press constituting the subject of mypresent invention is to convert th s ringshaped blank, into a hoop ofthe character shown in Fig. 6, and consisting of a ring member 4 withouter and inner flanges 5 and 6 projecting therefrom at a right angle orthereabcut, the inner flange 5 having at its free edge, an inwardlyprojecting flange 7 parallel or substantially parallel with the ringmember 4 of the hoop, although this flange may be omitted if desired.

Although I have shown both the blank and the hoop as in the form ofsplit rings the ends may be welted together if desired before subjectingthe blank to the action of the press, and the term ring as used here'ntherefore means either a split ring or a continuous ring.

In Figs. 1 and 2, 10 represents the bed of the press having seatedtherein a plate 11 with projecting annular die 12, said bed alsosupporting a cross head 13 in which The die 16 is in the form of aninverted cup whose outer annular flange operates in connection with theouterfaceof the annular die 12 and the die 17 is a circular plateoperating within the same in conjunction with the upper face of said dieand also in conjunction with a ring die 18 disposed adjacent to theinner face of the die 12 and movable vertically in an annular recess inthe plate 11, being normally projected by means of one or more coiledsprings 19 intel-posed between the base of said recess and the underface of the ring die 18, as shown in Fig. 2. i

The plunger 14; has at the top a head 20 carrying anti-friction rollers21 which are acted upon by cams 22 on a transverse shaft 23, and theinner plunger 15 has, at the top, an anti-friction roller 21 which isacted upon by a cam 25 on said shaft. The shaft 23 is carried by boxes26 whch are vertically guided in standards 27 at opposite sides of thecross head 13, said boxes resting upon tapered gibs 28 which can beadjusted by means of set screws 29 so as to raise or lower, to a.limited extent, the boxes 26 and the shaft carried thereby. The cams 22also act upon anti-friction rollers 30 carried by an upper shaft 31which is mounted in boxes 82 movable vertically in guides 33 mounted onthe standards 27, said shaft 31 being connected by yokes 3% to the head20 of the plunger 14, as shown in Fig. 1.

The shaft 23 may be rotated in any suitable manner, beingin the presentinstance provided with a clutch 35 whereby it can be connected to ordisconnected from a spur wheel 36, loosely mounted on the shaft, anddriven by means of a spur pinion 37 from a power shaft'38 adapted to abearing carried 42 therein for the reception of a lug 43 pro jectingfrom the inner plunger 15, Ora

? plural-.ty of such slots and lugs may be employed if desired.Depression of .the plunger 14 is effected by action of the cams 22 uponthe anti-friction rollers 21 on the head of said plunger and depressionof the inner plunger 1S effected by the action of the cam 25 upon theanti-friction roller 24 carried by said plunger 15, lifting of the;

' of the lug 43, but, owing to the slot 42,

commencing at a later of the plunger 14.

In the operation of the press the ringshaped blank is laid upon the topof the period than the lift annular die 12, when the dies16 and 17 are Iraised above said. die 12,'the inner' portion of the flange 1 restingupon the top of said die 12, the member 3 extending downwardly along theinner side of said die and the flange 2 resting uponthe top-of the ringdie 18. The die 17 first descends and clamps the' flange 1 upon the topof thedie 12 and the flange 2-upon the ring die 18, as shown in Fig.sothat the blank is firmly confined to the-die 12'with the flange 1projecting out wardly from the top of said die.

On the descent of the die 16 its-outer flange bends the outer portionofthe flange 1 down around the outer face of the die 12, as shown inFig. 4. In its descent the die 16 pressed the ring die 18 downwardly inthe recess in the die plate 11 and compressed the spring support uponwhich said ring die is mounted. consequently when the dies are againraised the ring die 18 will be forced upwardly so as to loosen the hoopfrom the die 12 and permit it to be carried away from the presspreparatory to the introduction of a. fresh blank.

In order to insure the lifting of the pressed hoop clear of the die 12 Imagnetize the dies 16 and 17, or either of them, and in order that thismagnetic attraction may be intermittent the magnetized die constitutesthe pole piece of an electromagnet through the winding of which theelectric circuit may be established when the die is at the lower portionof its movement and'can be cut off as the die rises so as to demagnetizethe same andpermit the hoop to drop therefrom or be readily removed. InFig. 7 I have illustrated one construction whereby this result may beattained. In the construction there shown the plunger 14 is providedwith a respectively, to the terminals of a n electric I circuit.

The plates 47 and'48 have spring fingers 49 which, when the plunger 14reaches a certain point in its descent, contact with the plates 46 andestablish an electric circuit through the winding 45 so as to convertthe r plungers l4'and 15int0 the cores of an electromagnet of which thedies 16 and 17 are independent wirings and electrical connec- The plates46 are of such tions operating in the manner above dedesired.

. In order to preventthe magnetization of the fixed frame of the machineand the fixed die the crossheadmay be provided with an insulatingbushing 50 for the passage of the plunger 14. -V V 7 When the die 17clamped the flange 2 of the blank against the upper face of the ring"die '18 it also served to flatten out any wrinkles or corrugations whichmay have" been formed in-said flange while the same was being'bentedgewise into ring form. As

the die 16 bends-the projecting portion of the flange 1 of the blankdown around the outer face of the die 12 wrinkles will also be formed atand near the free edge of said flange because of the contraction indiameter to which it is subjected,'but as the die 16 continues itsdescent these wrinkles will also be flattened by the time the die 16reaches the limit of its downward movement,'-or if it is not desired toso flatten them the down-V ward movement of the die 16 may be arrestedat a higher point. i

The'dies 16 and 17 may be screwed or otherwise detachably mounted uponthe lower ends of the plungers 14 and 15, respectively, so as, to bereadily removed and replaced, and the die plate 11 with its annular die12 and ring die 18 can also be readily removed frorn'the bed plate 10 ofthe press one set of dies for-another to accordwith differences in thediameter or crosssectional' form of the 'hoop'to he producednBy raisingor lowering the boxes 26 of the shaft 23 by means-of the gibs28 thelimit of descent of the dies 16 and 17 can be regulated and the pressthus adapted for actingupon sheet metal of different-degrees ofthickness.

I claim:

1. The combination, in a die press, of an' annular die, a pair ofdie-carrying plungers, and means for independently operating saidplungers, the die of one plunger pressing the blank against the face ofthe annular olie and forwardly along one side of the same, and the dieof the other plunger pressing the blank forwardly against the other sideof said annular die.

2. The combination, in a olie press, of an annular forming die, a dieinside of the same, a pair of die carrying plungers, and means forindependently operating said plungers, the die of one plunger pressingthe outer portion of the blank forwardly against the outer side of theannular die, and the die of the other plunger pressing the blank againstthe face of the annular die, forwardly against the inner side of saidannular die and against the face of the inner die.

3. The combination, in a die press, of an annular forming die, ayieldingly mounted die inside of the same, and a die-carrying plungerwhose die presses the blank against the face of the annular die,forwardly against the inner side of said annular die and against theface of said yieldingly mounted inner die.

4. The combination, in a die press, of an annular forming die, a dieinside of the same, a pair of die-carrying plungers, and means forindependently operating said plungers, the die of one plunger pressingthe blank against the face of the annular die, forwardly against theinner side of the same and against the face of the inner die, and thedie of the other plunger pressing the outer portion of the blankforwardly against the outer side of the annular die.

5. The combination, in a die press, of an annular forming die, ayieldingly mounted die inside of the same, a pair of die carryingplungers, and means for independently operating said plungers, the dieof one plunger pressing the blank against the face of the annular die,forwardly against the inner side of the same and against the face of theyieldingly mounted inner die, and the die of the other plunger pressingthe outer portion of the blank forwardly against the outer face of saidannular die. 7

6. The combination, in a die press, of apair of vertically movabledie-carrying plungers, cam mechanism for projecting the same and forretracting one of the plungers, and a connection between said plungerswhereby one is caused to retract the other.

7. The combination, in a die press, of a pair of movable die carryingplungers, cam mechanism for projecting the same and for retracting oneof the plungers, and a lost motion connection between said plungerswhereby one is caused to retract the other after the first plunger hascompleted a portion of its retracting movement.

8. The combination, in a die press, of an annular die, a pair ofplunger-s, one disposed 'ithin the other and guided thereby in itslongitudinal movement, an inverted cupshaped die carried by the outerplunger and constructed to press the outer portion of the blankforwardly around the outer side of said annular die, a die carried bythe inner plunger and operating within said outer die, said inner diebeing constructed to press the inner portion of the blank forwardlyaround the inner side of said annular die and means for independentlydepressing said plungers.

9. The combination, in a die press, of a die carrying plunger, a shafthaving cam mechanism for projecting said plunger, ashaft which is alsoacted upon by the same cam mechanism which projects the plunger, andlinks connecting said latter shaft and the plunger whereby the same cammechanism which projects the plunger is also caused to retract the same.

10. The combination, in a die press, of a fixed die, a movable die, aplunger carrying the latter, a shaft having cam mechanism for projectingsaid plunger, and means for raising and lowering said shaft in respectto the fixed die.

11. The combination, in a die press, of a die carrying plunger, a shafthaving cam mechanism for projecting said plunger, boxes carrying saidshaft, and adjustable supporting gibs for said boxes whereby they can beraised or lowered.

12. The combination, in a die press, of a fixed die, and a movable dieoperating in conjunction therewith, said movable die being magnetized soas to lift the pressed object from the fixed die on the retraction ofthe mo fable die.

13. A die press in which are combined two independently operating dies,means for simultaneously magnetizing both of said dies, and means forsimultaneously demagnetizing the same.

14. A die press in which are combined two independently operating dies,one inside of the other, means for simultaneously magnetizing both ofsaid dies, and means for simultaneously demagnetizing the same.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

EDWARD W. ROBINSON.

Witnesses KATE A. BEADLE, HAMILTON D. TURNER.

Copies of this patent may be obtained for five cents each. by addressingthe "Commissioner of Patents,

Washington, D. C.

